Citibank remembers your login name with a cookie. . .so when you re-visit the site you're presented with a pull down menu instead of a login field. Lastpass has nothing to fill in. Now it can just fill in the password and proceed. . .but if you have multiple accounts with different user names (as I do) autologin will fail. You cannot use the site w/o cookies.
There is a check box to remember the user name, and what causes the problem is that it is automatically checked every time. There is no url I can find that bypasses the pull down menu. Hopefully this is somewhat clear. Maybe the image will help explain it....http://img401.imageshack.us/my.php?image=citimt7.jpg